As long as appropriate credit is given to the authors/LA and the items aren't being sold or exchanged for anything, I think it's doable, though it's possible LA may frown on it. It's no different from fanfics, which we've been told in the past are fine to do as long as we're not trying to make any money off them.

From MST3K's spoof of "Hercules Unchained"--heard as Roman medic soldiers carry off an unconscious Greek Hercules on a 1950's Army green canvas stretcher: "Hi, we're IX-I-I. Did somebody dial IX-I-I?"

Up until the other day, I believed that this sort of thing would be Illegal. After Lucas released pieces of his films online for fan editing, I do not know what is or what is not Illegal with his frnachise. I guess the sky is the limit. Good luck man.